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/*
ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file QUADSPIv1/hal_qspi_lld.c
* @brief STM32 QSPI subsystem low level driver source.
*
* @addtogroup QSPI
* @{
*/
#include "hal.h"
#if HAL_USE_QSPI || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
#define QUADSPI1_DMA_CHANNEL \
STM32_DMA_GETCHANNEL(STM32_QSPI_QUADSPI1_DMA_STREAM, \
STM32_QUADSPI1_DMA_CHN)
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/** @brief QUADSPI1 driver identifier.*/
#if STM32_QSPI_USE_QUADSPI1 || defined(__DOXYGEN__)
QSPIDriver QSPID1;
#endif
/*===========================================================================*/
/* Driver local variables and types. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/**
* @brief Shared service routine.
*
* @param[in] qspip pointer to the @p QSPIDriver object
* @param[in] flags pre-shifted content of the ISR register
*/
static void qspi_lld_serve_dma_interrupt(QSPIDriver *qspip, uint32_t flags) {
(void)qspip;
(void)flags;
/* DMA errors handling.*/
#if defined(STM32_QSPI_DMA_ERROR_HOOK)
if ((flags & (STM32_DMA_ISR_TEIF | STM32_DMA_ISR_DMEIF)) != 0) {
STM32_QSPI_DMA_ERROR_HOOK(qspip);
}
#endif
}
/**
* @brief Shared service routine.
*
* @param[in] qspip pointer to the @p QSPIDriver object
*/
static void qspi_lld_serve_interrupt(QSPIDriver *qspip) {
/* Stop everything.*/
dmaStreamDisable(qspip->dma);
/* Portable QSPI ISR code defined in the high level driver, note, it is
a macro.*/
_qspi_isr_code(qspip);
}
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
#if STM32_QSPI_USE_QUADSPI1 || defined(__DOXYGEN__)
#if !defined(STM32_QUADSPI1_SUPPRESS_ISR)
#if !defined(STM32_QUADSPI1_HANDLER)
#error "STM32_QUADSPI1_HANDLER not defined"
#endif
/**
* @brief STM32_QUADSPI1_HANDLER interrupt handler.
*
* @isr
*/
OSAL_IRQ_HANDLER(STM32_QUADSPI1_HANDLER) {
OSAL_IRQ_PROLOGUE();
QUADSPI->FCR = QUADSPI_FCR_CTEF | QUADSPI_FCR_CTCF |
QUADSPI_FCR_CSMF | QUADSPI_FCR_CTOF;
qspi_lld_serve_interrupt(&QSPID1);
OSAL_IRQ_EPILOGUE();
}
#endif /* !defined(STM32_QUADSPI1_SUPPRESS_ISR) */
#endif /* STM32_QSPI_USE_QUADSPI1 */
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level QSPI driver initialization.
*
* @notapi
*/
void qspi_lld_init(void) {
#if STM32_QSPI_USE_QUADSPI1
qspiObjectInit(&QSPID1);
QSPID1.qspi = QUADSPI;
QSPID1.dma = STM32_DMA_STREAM(STM32_QSPI_QUADSPI1_DMA_STREAM);
QSPID1.dmamode = STM32_DMA_CR_CHSEL(QUADSPI1_DMA_CHANNEL) |
STM32_DMA_CR_PL(STM32_QSPI_QUADSPI1_DMA_PRIORITY) |
STM32_DMA_CR_PSIZE_BYTE |
STM32_DMA_CR_MSIZE_BYTE |
STM32_DMA_CR_MINC |
STM32_DMA_CR_DMEIE |
STM32_DMA_CR_TEIE;
nvicEnableVector(STM32_QUADSPI1_NUMBER, STM32_QSPI_QUADSPI1_IRQ_PRIORITY);
#endif
}
/**
* @brief Configures and activates the QSPI peripheral.
*
* @param[in] qspip pointer to the @p QSPIDriver object
*
* @notapi
*/
void qspi_lld_start(QSPIDriver *qspip) {
/* If in stopped state then full initialization.*/
if (qspip->state == QSPI_STOP) {
#if STM32_QSPI_USE_QUADSPI1
if (&QSPID1 == qspip) {
bool b = dmaStreamAllocate(qspip->dma,
STM32_QSPI_QUADSPI1_DMA_IRQ_PRIORITY,
(stm32_dmaisr_t)qspi_lld_serve_dma_interrupt,
(void *)qspip);
osalDbgAssert(!b, "stream already allocated");
rccEnableQUADSPI1(false);
}
#endif
/* Common initializations.*/
dmaStreamSetPeripheral(qspip->dma, &qspip->qspi->DR);
}
/* QSPI setup and enable.*/
qspip->qspi->DCR = qspip->config->dcr;
qspip->qspi->CR = ((STM32_QSPI_QUADSPI1_PRESCALER_VALUE - 1U) << 24U) |
QUADSPI_CR_TCIE | QUADSPI_CR_DMAEN | QUADSPI_CR_EN;
qspip->qspi->FCR = QUADSPI_FCR_CTEF | QUADSPI_FCR_CTCF |
QUADSPI_FCR_CSMF | QUADSPI_FCR_CTOF;
}
/**
* @brief Deactivates the QSPI peripheral.
*
* @param[in] qspip pointer to the @p QSPIDriver object
*
* @notapi
*/
void qspi_lld_stop(QSPIDriver *qspip) {
/* If in ready state then disables the QUADSPI clock.*/
if (qspip->state == QSPI_READY) {
/* QSPI disable.*/
qspip->qspi->CR = 0U;
/* Releasing the DMA.*/
dmaStreamRelease(qspip->dma);
/* Stopping involved clocks.*/
#if STM32_QSPI_USE_QUADSPI1
if (&QSPID1 == qspip) {
rccDisableQUADSPI1(FALSE);
}
#endif
}
}
/**
* @brief Sends a command without data phase.
* @post At the end of the operation the configured callback is invoked.
*
* @param[in] qspip pointer to the @p QSPIDriver object
* @param[in] cmd pointer to the command descriptor
*
* @notapi
*/
void qspi_lld_command(QSPIDriver *qspip, const qspi_command_t *cmdp) {
qspip->qspi->DLR = 0U;
qspip->qspi->ABR = cmdp->alt;
qspip->qspi->CCR = cmdp->cfg;
if ((cmdp->cfg & QSPI_CFG_ADDR_MODE_MASK) != QSPI_CFG_ADDR_MODE_NONE) {
qspip->qspi->AR = cmdp->addr;
}
}
/**
* @brief Sends a command with data over the QSPI bus.
* @post At the end of the operation the configured callback is invoked.
*
* @param[in] qspip pointer to the @p QSPIDriver object
* @param[in] cmd pointer to the command descriptor
* @param[in] n number of bytes to send
* @param[in] txbuf the pointer to the transmit buffer
*
* @notapi
*/
void qspi_lld_send(QSPIDriver *qspip, const qspi_command_t *cmdp,
size_t n, const uint8_t *txbuf) {
dmaStreamSetMemory0(qspip->dma, txbuf);
dmaStreamSetTransactionSize(qspip->dma, n);
dmaStreamSetMode(qspip->dma, qspip->dmamode | STM32_DMA_CR_DIR_M2P);
qspip->qspi->DLR = n - 1;
qspip->qspi->ABR = cmdp->alt;
qspip->qspi->CCR = cmdp->cfg;
qspip->qspi->AR = cmdp->addr;
dmaStreamEnable(qspip->dma);
}
/**
* @brief Sends a command then receives data over the QSPI bus.
* @post At the end of the operation the configured callback is invoked.
*
* @param[in] qspip pointer to the @p QSPIDriver object
* @param[in] cmd pointer to the command descriptor
* @param[in] n number of bytes to send
* @param[out] rxbuf the pointer to the receive buffer
*
* @notapi
*/
void qspi_lld_receive(QSPIDriver *qspip, const qspi_command_t *cmdp,
size_t n, uint8_t *rxbuf) {
dmaStreamSetMemory0(qspip->dma, rxbuf);
dmaStreamSetTransactionSize(qspip->dma, n);
dmaStreamSetMode(qspip->dma, qspip->dmamode | STM32_DMA_CR_DIR_P2M);
qspip->qspi->DLR = n - 1;
qspip->qspi->ABR = cmdp->alt;
qspip->qspi->CCR = cmdp->cfg | QUADSPI_CCR_FMODE_0;
qspip->qspi->AR = cmdp->addr;
dmaStreamEnable(qspip->dma);
}
#endif /* HAL_USE_QSPI */
/** @} */
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